Nitrogen removal performance and mechanism in constructed wetlands under saline conditions: Role of Canna indica inoculated with Piriformospora indica

文献类型： 外文期刊

第一作者： Cui, Naxin

作者： Cui, Naxin;Cai, Min;Zhang, Xu;Zeng, Rong;Zhou, Li;Chen, Guifa;Zou, Guoyan;Cui, Naxin;Cai, Min;Zhang, Xu;Zeng, Rong;Zhou, Li;Chen, Guifa;Zou, Guoyan;Cui, Naxin;Zeng, Rong

作者机构：

关键词： Phytoremediation; Salt stress; Rhizosphere microbe; Plant uptake; Growth-promoting fungus

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.7； 五年影响因子：9.4 ）

ISSN： 0960-8524

年卷期： 2024 年 408 卷

页码：

收录情况： SCI

摘要： The phytopromotional root endophytic fungus Piriformospora indica was introduced into the wetland plant Canna indica L. to explore its impact on nitrogen (N) removal in constructed wetlands (CWs) to treat normal and saline (0.9 % NaCl) wastewater. P. indica colonization increased total nitrogen, NH4+-N, and NO3--N removal efficiencies under normal and saline conditions, with NO3--N removal rates significantly increasing by 17.5 % under saline conditions (P<0.05). N removal by plant uptake improved by 26.1 % and 27.7 % under normal and saline conditions due to P. indica-mediated growth-promoting effects. Salt-tolerant denitrifiers and nitrifiers guaranteed the dominant role of microbial degradation in N removal under saline conditions. P. indica inoculation considerably improved the contribution of Nocardioides and Nitrosomnas to dissimilatory/assimilatory nitrate reduction and nitrification genes, respectively. These findings elucidate the mechanisms and potential applications of P. indica-mediated phytoremediation in practical wastewater treatment under varying salty conditions.

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